//
// Copyright (C) OpenSim Ltd.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program; if not, see <http://www.gnu.org/licenses/>.
//

#ifndef __INET_TCPCRCINSERTIONHOOK_H
#define __INET_TCPCRCINSERTIONHOOK_H

#include "inet/common/INETDefs.h"
#include "inet/common/Protocol.h"
#include "inet/networklayer/contract/INetfilter.h"
#include "inet/transportlayer/common/CrcMode_m.h"
#include "inet/transportlayer/tcp_common/TcpCrcInsertionHook.h"
#include "inet/transportlayer/tcp_common/TcpHeader.h"

namespace inet {
namespace tcp {

class TcpCrcInsertion : public NetfilterBase::HookBase {
  public:
    static void insertCrc(const Protocol *networkProtocol, const L3Address& srcAddress, const L3Address& destAddress, const Ptr<TcpHeader>& tcpHeader, Packet *tcpPayload);
    static uint16_t computeCrc(const Protocol *networkProtocol, const L3Address& srcAddress, const L3Address& destAddress, const Ptr<const TcpHeader>& tcpHeader, const Ptr<const Chunk>& tcpData);

    virtual Result datagramPreRoutingHook(Packet *packet) override { return ACCEPT; }
    virtual Result datagramForwardHook(Packet *packet) override { return ACCEPT; }
    virtual Result datagramPostRoutingHook(Packet *packet) override;
    virtual Result datagramLocalInHook(Packet *packet) override { return ACCEPT; }
    virtual Result datagramLocalOutHook(Packet *packet) override { return ACCEPT; }
};

} // namespace tcp
} // namespace inet

#endif // ifndef __INET_TCPCRCINSERTIONHOOK_H

